在使用docker容器时，容器一般没有安装vim，就需要安装vim
apt-get install vim命令用于安装vim，但是下载过慢。
第一步 配置国内镜像源
进入某个容器
例如进入mysql
docker exec -it mysql /bin/bash
mv /etc/apt/sources.list /etc/apt/sources.list.bak
echo "deb http://mirrors.163.com/debian/ jessie main non-free contrib" >> /etc/apt/sources.list
echo "deb http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list
echo "deb-src http://mirrors.163.com/debian/ jessie main non-free contrib" >>/etc/apt/sources.list
echo "deb-src http://mirrors.163.com/debian/ jessie-proposed-updates main non-free contrib" >>/etc/apt/sources.list
第二步：更新源
apt update
第三步安装vim
apt-get install vim
